package com.lrm.blog.dao;

import com.lrm.blog.po.Blog;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

//JpaSpecificationExecutor<Blog>封装了组合查询
public interface BlogRepository extends JpaRepository<Blog,Long>, JpaSpecificationExecutor<Blog> {

    @Query("select b from Blog b where b.recommend =true")
    List<Blog> findTop(Pageable pageable);

    //like ?1 or b.content like ?1不会帮我们处理百分号%，所以在query中我们要将%自己加进去
    @Query("select b from Blog b where b.title like ?1 or b.content like ?1")
//    @Query("select b from Blog b where b.title like ?1 or b.description like ?1")
    Page<Blog> findByQuery(String query,Pageable pageable);

    @Transactional
    @Modifying
    @Query("update Blog b set b.views = b.views+1 where b.id=?1")
    int updateViews(Long id);

    @Query("select function('date_format',b.updateTime,'%Y') as year from Blog b group by function('date_format',b.updateTime,'%Y') order by 'year' DESC ")
//    @Query("select function('date_format',b.updateTime,'%Y') as year from Blog b where b.published = true group by function('date_format',b.updateTime,'%Y') order by year desc ")
    List<String> findGroupYear();

    @Query("select b from Blog b where function('date_format',b.updateTime,'%Y')=?1")
    List<Blog> findByYear(String year);
}
